On Thursday 01 April 2004 20:46, Ji Haitao wrote: > I create a MD having 100 targets with dmsetup. IO error occurs when I > access the 100th target. My operation steps are : > > 1.#create md > sh> dmsetup create vd1 dmtable1 > > 2. > #access the 100th target > sh> dd bs=512 count=10 if=/dev/zero of=/dev/mapper/vd1 seek=51380224 > > #errors happen > dd: writing `/dev/mapper/vd1': Input/output error > 1+0 records in > 0+0 records out I ran your 100-target table on one of my systems. Did a dd of the entire device with no I/O errors. I'm running device-mapper.1.00.08 on a 2.6.5-rc3 kernel. > If I only have 99 targets in dmtable1, everything is OK when I access > the 99th target. Why? If device-mapper can support more than 100 targets > in 1 MD ? > The configuration of my Linux host is: > CPU: P4 1.4G > MEM: 512M > Kernel: 2.4.21 > device-mapper.1.00.05 > dd (fileutils) 4.1.9 1.00.05 is a bit out-of-date. I'd suggest upgrading to device-mapper.1.00.09 (upgrade both the tools and the kernel patches) and see if the problem persists. -- Kevin Corry kevcorry@xxxxxxxxxx http://evms.sourceforge.net
